CN2190339Y

CN2190339Y - ZnO high voltage conductor

Info

Publication number: CN2190339Y
Application number: CN 94205386
Authority: CN
Inventors: 付中庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-24
Filing date: 1994-03-24
Publication date: 1995-02-22
Anticipated expiration: 2004-03-24

Abstract

The utility model relates to a zno high-voltage conductor. A core comprising a zinc oxide valve plate and a semiconductor gap is positioned in an insulating rubber sleeve; both ends of the core are connected with aluminium pressing joints; the outer part of the core is provided with an insulating silk tape. The utility model has favorable performance, low residual voltage, large through flow; the utility model is not easy to be damaged by exogenic action, and thus the utility model has favorable insulating performance; once the interior core is damaged because that strong current punctures the utility model, the rubber sleeve drops out from the core to be convenience for observation and maintenance. The utility model can be used for overvoltage protection, and is also suitable for the protection of rotating electric machines in corresponding voltage levels of mining transformer stations and electric power lines, or the protection of other lightly insulated high-voltage electric appliances.

Description

ZnO high voltage conductor

The utility model relates to a kind of zinc oxide high-voltage arrester, and it not only can be used for overvoltage protection, but also is applicable to the electric rotating machine of protection relevant voltage grade in mining transformer station and the power circuit and the High-Voltage Electrical Appliances of other weak insulation.

Usually; be used for protecting the lightning arrester of high-voltage electrical equipment insulation and operation atmospheric over-voltage mainly to be divided into two kinds of suspension type and self-supportings; its structure all is to be primary element with carborundum valve block or zinc oxide valve plate; the valve block group is connected with mica gap with holes; constitute fuse; be provided with holddown spring between the insulator of a fuse and an outside insulating effect; the insulator two ends seal with metal rolling; because this lightning arrester is after one section use, the elasticity attenuation of holddown spring causes the valve block gap to become big; make the valve block contact bad; and, the mica gap behind multiple discharge, the valve block surface oxidation of connecting with making; cause losing discharge process; simultaneously, insulator is subject to the external force effect and crackle makes insulation harm.This lightning arrester not only volume is big, and performance and insulate relatively poorly, when inner fuse damages, also is difficult for finding.

The purpose of this utility model is to provide low, through-flow big, the performance of a kind of residual voltage and insulate, not the zinc oxide high-voltage arrester of easy damaged.

Its concrete solution is: adopt semiconductor chip to do the gap in the fuse, and be arranged between the zinc oxide valve plate of fuse one end, utilize the semiconductor frequency response time short, recovery time is fast, overvoltage absorbs and the good characteristics of soft breakdown characteristic, realizes the purpose that the utility model residual voltage is low, through-flow greatly, performance is good.The two ends of fuse are connected with aluminium joint, and the arranged outside of fuse has one deck insulating tape, and the insulating tape outside is the electro-insulating rubber sealing shroud, and the two ends of insulating case are provided with outer fastening aluminium cover, thereby realize the purpose that insulation is good.

The utility model is owing to adopt semi-conducting material to do the gap, and employing electro-insulating rubber sealing shroud, so not only performance is good, residual voltage is low, through-flow big, resume speed is fast, and be not subject to the external force effect and damage, make its insulation better, in case heavy current punctures when inner fuse is damaged, gum cover will come off with fuse, make to be convenient to observe and maintenance.

In conjunction with the accompanying drawings the utility model is described in detail below by embodiment:

Fig. 1 is the utility model structural front view.

Fig. 2 is the utility model core structures schematic diagram.

In the accompanying drawing, fuse is positioned at insulation gum cover (2), how much can determining of fuse middle valve plate (4) according to electric pressure, semiconductor gap (7) is arranged between two valve blocks (4) of fuse one end, the two ends of fuse are connected with aluminium crimp head (6), the outside of fuse is wound with insulation silk ribbon (5), insulating case (2) is made for the electro-insulating rubber material, and the two ends of insulating case (2) are provided with outer fastening aluminium cover (1), the cylinder of insulating case (2) is provided with the full skirt of being made by the electro-insulating rubber material (3), in case the rainy day lightning arrester insulation destroys, the bolt (8) that can pass through the connection of aluminium joint (6) two ends during use is connected with electrical equipment.

Claims

1, a kind of zinc oxide high-voltage arrester, mainly constitute by insulating case and the fuse that is positioned at insulating case, insulating case (2) is outside equipped with full skirt (3), it is characterized in that doing the gap with semiconductor sheet (7) in the fuse and being arranged between the zinc oxide valve plate (4) of fuse one end, the two ends of fuse are connected with aluminium joint (6), and the outer setting of fuse has one deck insulating tape (5)

2, zinc oxide high-voltage arrester according to claim 1 is characterized in that insulating case (2) and full skirt (3) are that rubber insulation material makes.